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-rw-r--r--src/aircraft_cmd.cpp174
1 files changed, 102 insertions, 72 deletions
diff --git a/src/aircraft_cmd.cpp b/src/aircraft_cmd.cpp
index a0c3acfdc..429b16d4f 100644
--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -862,21 +862,35 @@ static void PlayAircraftSound(const Vehicle* v)
}
}
-/** Special velocities for aircraft
+/**
+ * Special velocities for aircraft
*/
enum AircraftSpeedLimits {
- SPEED_LIMIT_NONE = 0, ///< No environmental speed limit. Speed limit is type dependent
- SPEED_LIMIT_TAXI = 12, ///< Maximum speed of an aircraft while taxiing
- SPEED_LIMIT_BROKEN = 27, ///< Maximum speed of an aircraft that is broken
+ SPEED_LIMIT_TAXI = 50, ///< Maximum speed of an aircraft while taxiing
+ SPEED_LIMIT_APPROACH = 230, ///< Maximum speed of an aircraft on finals
+ SPEED_LIMIT_BROKEN = 320, ///< Maximum speed of an aircraft that is broken
+ SPEED_LIMIT_HOLD = 425, ///< Maximum speed of an aircraft that flies the holding pattern
+ SPEED_LIMIT_NONE = 0xFFFF ///< No environmental speed limit. Speed limit is type dependent
};
-static bool UpdateAircraftSpeed(Vehicle *v, uint speed_limit)
+/**
+ * Sets the new speed for an aircraft
+ * @param v The vehicle for which the speed should be obtained
+ * @param speed_limit The maximum speed the vehicle may have.
+ * @param hard_limit If true, the limit is directly enforced, otherwise the plane is slowed down gradually
+ * @return The number of position updates needed within the tick
+ */
+static int UpdateAircraftSpeed(Vehicle *v, uint speed_limit = SPEED_LIMIT_NONE, bool hard_limit = true)
{
- uint spd = v->acceleration * 2;
+ uint spd = v->acceleration * 16;
byte t;
+ speed_limit = min(speed_limit, v->max_speed);
+
v->subspeed = (t=v->subspeed) + (byte)spd;
- if (speed_limit == SPEED_LIMIT_NONE) speed_limit = v->max_speed;
+
+ if (!hard_limit && v->cur_speed > speed_limit) speed_limit = v->cur_speed - (v->cur_speed / 48);
+
spd = min(v->cur_speed + (spd >> 8) + (v->subspeed < t), speed_limit);
/* adjust speed for broken vehicles */
@@ -891,13 +905,9 @@ static bool UpdateAircraftSpeed(Vehicle *v, uint speed_limit)
if (!(v->direction & 1)) spd = spd * 3 / 4;
- if (spd == 0) return false;
-
- if ((byte)++spd == 0) return true;
-
- v->progress = (t = v->progress) - (byte)spd;
-
- return t < v->progress;
+ spd += v->progress;
+ v->progress = (byte)spd;
+ return spd >> 8;
}
/**
@@ -922,20 +932,28 @@ static byte GetAircraftFlyingAltitude(const Vehicle *v)
case DIR_NE:
case DIR_E:
case DIR_SE:
- base_altitude += 15;
+ base_altitude += 10;
break;
default: break;
}
/* Make faster planes fly higher so that they can overtake slower ones */
- base_altitude += min(30 * (v->max_speed / 37), 90);
+ base_altitude += min(20 * (v->max_speed / 200), 90);
return base_altitude;
}
+/**
+ * Controls the movement of an aircraft. This function actually moves the vehicle
+ * on the map and takes care of minor things like sound playback.
+ * @todo De-mystify the cur_speed values for helicopter rotors.
+ * @param v The vehicle that is moved. Must be the first vehicle of the chain
+ * @return Whether the position requested by the State Machine has been reached
+ */
static bool AircraftController(Vehicle *v)
{
+ int count;
const Station *st = GetStation(v->u.air.targetairport);
/* prevent going to 0,0 if airport is deleted. */
@@ -958,7 +976,8 @@ static bool AircraftController(Vehicle *v)
if (--u->cur_speed == 32) SndPlayVehicleFx(SND_18_HELICOPTER, v);
} else {
u->cur_speed = 32;
- if (UpdateAircraftSpeed(v, SPEED_LIMIT_NONE)) {
+ count = UpdateAircraftSpeed(v);
+ if (count > 0) {
v->tile = 0;
/* Reached altitude? */
@@ -966,7 +985,7 @@ static bool AircraftController(Vehicle *v)
v->cur_speed = 0;
return true;
}
- SetAircraftPosition(v, v->x_pos, v->y_pos, v->z_pos+1);
+ SetAircraftPosition(v, v->x_pos, v->y_pos, min(v->z_pos + count, 184));
}
}
return false;
@@ -974,7 +993,8 @@ static bool AircraftController(Vehicle *v)
/* Helicopter landing. */
if (amd->flag & AMED_HELI_LOWER) {
- if (UpdateAircraftSpeed(v, SPEED_LIMIT_NONE)) {
+ count = UpdateAircraftSpeed(v);
+ if (count > 0) {
if (st->airport_tile == 0) {
/* FIXME - AircraftController -> if station no longer exists, do not land
* helicopter will circle until sign disappears, then go to next order
@@ -988,7 +1008,7 @@ static bool AircraftController(Vehicle *v)
v->tile = st->airport_tile;
/* Find altitude of landing position. */
- uint z = GetSlopeZ(x, y) + 1 + afc->delta_z;
+ int z = GetSlopeZ(x, y) + 1 + afc->delta_z;
if (z == v->z_pos) {
Vehicle *u = v->next->next;
@@ -997,9 +1017,9 @@ static bool AircraftController(Vehicle *v)
if (u->cur_speed >= 80) return true;
u->cur_speed += 4;
} else if (v->z_pos > z) {
- SetAircraftPosition(v, v->x_pos, v->y_pos, v->z_pos-1);
+ SetAircraftPosition(v, v->x_pos, v->y_pos, max(v->z_pos - count, z));
} else {
- SetAircraftPosition(v, v->x_pos, v->y_pos, v->z_pos+1);
+ SetAircraftPosition(v, v->x_pos, v->y_pos, min(v->z_pos + count, z));
}
}
return false;
@@ -1009,8 +1029,7 @@ static bool AircraftController(Vehicle *v)
uint dist = myabs(x + amd->x - v->x_pos) + myabs(y + amd->y - v->y_pos);
/* Need exact position? */
- if (!(amd->flag & AMED_EXACTPOS) && dist <= (amd->flag & AMED_SLOWTURN ? 8U : 4U))
- return true;
+ if (!(amd->flag & AMED_EXACTPOS) && dist <= (amd->flag & AMED_SLOWTURN ? 8U : 4U)) return true;
/* At final pos? */
if (dist == 0) {
@@ -1032,71 +1051,82 @@ static bool AircraftController(Vehicle *v)
return false;
}
- if (!UpdateAircraftSpeed(v, ((amd->flag & AMED_NOSPDCLAMP) == 0) ? SPEED_LIMIT_TAXI : SPEED_LIMIT_NONE)) return false;
+ uint speed_limit = SPEED_LIMIT_TAXI;
+ bool hard_limit = true;
+
+ if (amd->flag & AMED_NOSPDCLAMP) speed_limit = SPEED_LIMIT_NONE;
+ if (amd->flag & AMED_HOLD) { speed_limit = SPEED_LIMIT_HOLD; hard_limit = false; }
+ if (amd->flag & AMED_LAND) { speed_limit = SPEED_LIMIT_APPROACH; hard_limit = false; }
+ if (amd->flag & AMED_BRAKE) { speed_limit = SPEED_LIMIT_TAXI; hard_limit = false; }
+
+ count = UpdateAircraftSpeed(v, speed_limit, hard_limit);
+ if (count == 0) return false;
if (v->load_unload_time_rem != 0) v->load_unload_time_rem--;
- /* Turn. Do it slowly if in the air. */
- Direction newdir = GetDirectionTowards(v, x + amd->x, y + amd->y);
- if (newdir != v->direction) {
- if (amd->flag & AMED_SLOWTURN) {
- if (v->load_unload_time_rem == 0) v->load_unload_time_rem = 8;
- v->direction = newdir;
- } else {
- v->cur_speed >>= 1;
+ do {
+ /* Turn. Do it slowly if in the air. */
+ Direction newdir = GetDirectionTowards(v, x + amd->x, y + amd->y);
+ if (newdir != v->direction) {
v->direction = newdir;
+ if (amd->flag & AMED_SLOWTURN) {
+ if (v->load_unload_time_rem == 0) v->load_unload_time_rem = 8;
+ } else {
+ v->cur_speed >>= 1;
+ }
}
- }
- /* Move vehicle. */
- GetNewVehiclePosResult gp = GetNewVehiclePos(v);
- v->tile = gp.new_tile;
+ /* Move vehicle. */
+ GetNewVehiclePosResult gp = GetNewVehiclePos(v);
+ v->tile = gp.new_tile;
+ /* If vehicle is in the air, use tile coordinate 0. */
+ // if (amd->flag & (AMED_TAKEOFF | AMED_SLOWTURN | AMED_LAND)) v->tile = 0;
- /* If vehicle is in the air, use tile coordinate 0. */
- if (amd->flag & (AMED_TAKEOFF | AMED_SLOWTURN | AMED_LAND)) v->tile = 0;
+ /* Adjust Z for land or takeoff? */
+ uint z = v->z_pos;
- /* Adjust Z for land or takeoff? */
- uint z = v->z_pos;
+ if (amd->flag & AMED_TAKEOFF) {
+ z = min(z + 2, GetAircraftFlyingAltitude(v));
+ }
- if (amd->flag & AMED_TAKEOFF) {
- z = min(z + 2, GetAircraftFlyingAltitude(v));
- }
+ if ((amd->flag & AMED_HOLD) && (z > 150)) z--;
- if (amd->flag & AMED_LAND) {
- if (st->airport_tile == 0) {
- v->u.air.state = FLYING;
- AircraftNextAirportPos_and_Order(v);
- /* get aircraft back on running altitude */
- SetAircraftPosition(v, gp.x, gp.y, GetAircraftFlyingAltitude(v));
- return false;
- }
+ if (amd->flag & AMED_LAND) {
+ if (st->airport_tile == 0) {
+ /* Airport has been removed, abort the landing procedure */
+ v->u.air.state = FLYING;
+ AircraftNextAirportPos_and_Order(v);
+ /* get aircraft back on running altitude */
+ SetAircraftPosition(v, gp.x, gp.y, GetAircraftFlyingAltitude(v));
+ continue;
+ }
- uint curz = GetSlopeZ(x, y) + 1;
+ uint curz = GetSlopeZ(x, y) + 1;
- if (curz > z) {
- z++;
- } else {
- int t = max(1U, dist - 4);
+ if (curz > z) {
+ z++;
+ } else {
+ int t = max(1U, dist - 4);
- z -= ((z - curz) + t - 1) / t;
- if (z < curz) z = curz;
+ z -= ((z - curz) + t - 1) / t;
+ if (z < curz) z = curz;
+ }
}
- }
- /* We've landed. Decrase speed when we're reaching end of runway. */
- if (amd->flag & AMED_BRAKE) {
- uint curz = GetSlopeZ(x, y) + 1;
+ /* We've landed. Decrase speed when we're reaching end of runway. */
+ if (amd->flag & AMED_BRAKE) {
+ uint curz = GetSlopeZ(x, y) + 1;
- if (z > curz) {
- z--;
- } else if (z < curz) {
- z++;
- }
+ if (z > curz) {
+ z--;
+ } else if (z < curz) {
+ z++;
+ }
- if (dist < 64 && v->cur_speed > 12) v->cur_speed -= 4;
- }
+ }
- SetAircraftPosition(v, gp.x, gp.y, z);
+ SetAircraftPosition(v, gp.x, gp.y, z);
+ } while (--count != 0);
return false;
}
@@ -2067,7 +2097,7 @@ void Aircraft_Tick(Vehicle *v)
AgeAircraftCargo(v);
- for (uint i = 0; i != 6; i++) {
+ for (uint i = 0; i != 2; i++) {
AircraftEventHandler(v, i);
if (v->type != VEH_Aircraft) // In case it was deleted
break;
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-08-07 22:43:55 +0000